CN104779686B - Method for improving efficiency of ICPT (inductively coupled power transfer)-based non-contact charging for electric vehicle - Google Patents
Method for improving efficiency of ICPT (inductively coupled power transfer)-based non-contact charging for electric vehicle Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 27
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- 230000005674 electromagnetic induction Effects 0.000 claims description 20
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
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- 230000005540 biological transmission Effects 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
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- H02J7/025—
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- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a method for improving the efficiency of ICPT (inductively coupled power transfer)-based non-contact charging for an electric vehicle. The method comprises the following steps: data of an ICPT system model are prepared; the frequency factor of a secondary side coil is adjusted to enable the transfer power P2 of the secondary side coil to be smaller than or equal to the load power Pload of the electric vehicle, and then the cross sectional areas of a primary side coil and the secondary side coil are adjusted to enable the current density of the primary side coil and the secondary side coil to be smaller than the maximum current density of the primary side coil and the secondary side coil; whether the current numbers of turns of the primary side coil and the secondary side coil are smaller than the maximum numbers of turns of the primary side coil and the secondary side coil is determined, and one is added to each of the current number of turns of the primary side coil and the current number of turns of the secondary side coil; whether combination of compensation topological structures of the primary and secondary side coils and the ICPT system improves the efficiency is judged, and the final coil is finished through optimization. The method has the benefits that the normal operation of the designed system is detected under the 2kW power standard, the efficiency is as high as 82%, and the wireless charging safety and sufficient energy use are improved effectively.
Description
Technical field
The present invention provides a kind of electric automobile contactless charge efficiency method improving based on electromagnetic induction coupling principle.
Background technology
In the case of the huge challenge that Present Global auto industry faces financial crisis and energy environment issues, development electricity
Electrical automobile, realizes the electrification of energy source of car dynamical system, promotes the strategic transformation of orthodox car industry, in the world shape
Become extensive common recognition.At present, China has put into effect many policies, helps and guide the fast development of electric automobile industry, and government anticipates
It is intended to the competitiveness accelerating to improve domestic electric motor car industry, shortens the period of maturation, realize " bend is overtaken other vehicles " to Automobile Industry Abroad.Electricity
The critical period is stepped in the development of electrical automobile, and Opportunity coexists with challenge.
Application on electric automobile for the wireless charging technology, is by being embedded in the primary winding of earth's surface and being fixed on vehicle
The electromagnetic coupled of the secondary coil on chassis is transmitted electric energy to realize.With the development of electric automobile and mobile robot etc.,
The demand of wireless charging is increasing.Electrokinetic cell is charged, there is safety and environmental protection, full-automatic, non-maintaining etc. a series of
Advantage.In the three kinds of wireless charging technology commonly used at present, because icpt and erpt is higher in the efficiency of transmission of moderate distance, more suitable
Together in charging electric vehicle.
Inductively coupled power transfer technology icpt by the inductively magnetic circuit of traditional transformer separately, realizes power supply and load
Not physically connected energy coupling between unit.By designing the different geometries of former secondary coil, and the circle to former secondary coil
The parametric variable such as number, cross-sectional area and its relative position is optimized and compares, finally draw a kind of optimum based on icpt system
The method of the contactless charge efficiency of electric automobile of system.
Content of the invention
The problem existing for prior art, the present invention provides a kind of electronic vapour improving based on electromagnetic induction coupling principle
Chefei's contact charge efficiency method, its objective is that the icpt system of design optimization is come for charging batteries of electric automobile, close
Reach the maximization of efficiency transmission.
For achieving the above object, the technical solution used in the present invention is to provide a kind of raising to be based on electromagnetic induction coupling principle
Electric automobile contactless charge efficiency method, the method is in primary coil external power supply, by electromagnetic induction coupling auxiliary
Sideline circle is carried out to device systems charging under conditions of producing energy, and this device systems includes the former limit line of guide rail laying
Circle and the built-in secondary coil of electric automobile, change described former secondary coil by the topological structure of electromagnetic induction coupled system
The relative position of sized turns and former secondary coil to carry out contactless charging to batteries of electric automobile, and the method includes following
Step:
A) data of electromagnetic induction coupling system model prepares, and the input voltage including primary coil is set as 220v, former
The maximum number of turn of sideline circle is set as 27 circles, and the maximum number of turn of secondary coil is set as 7 circles, the maximum current density of primary coil
It is set as 5a/mm2, the maximum current density of secondary coil is set as 4a/mm2, the initial number of turn of primary coil and secondary coil is equal
It is set as 1 circle, the cross-sectional area of primary coil is set as 2.5mm2, the cross-sectional area of secondary coil is set as 10mm2, secondary line
The frequency factor of circle is set as 1.
B), after data is ready to complete, the frequency factor of adjustment secondary coil is so that transfer power p of secondary coil2≤ electricity
Bearing power p of electrical automobileload, then the cross-sectional area of adjustment primary coil and secondary coil is so that the electricity of former secondary coil
Current density is less than the maximum current density of former secondary coil.
C), after electric current density meets requirement, judge whether primary coil and the existing number of turn of secondary coil are less than primary coil
With the maximum number of turn of secondary coil, and add one to the existing number of turn of primary coil and secondary coil.
D) detect the compensation topology structure of former secondary coil and the icpt system of equipment combine whether reach efficiency raising
Requirement, optimize complete final coil.
The effect of the present invention is that the raising that the method is proposed is applied to charging batteries of electric automobile based on icpt system
Preferable optimized design approach can realize the energy utilization rate that automobile batteries is charged close to maximization.Different by carrying out
Test, the normal operation of meter systems set by detection under the standard of a 2-kw power, result shows that the method helps realize
The efficiency of one up to 82%, this efficiency even can be realized in the environment of having the big air channel of 15cm at one, have
Effect improves safety and the making full use of property of the energy of wireless charging.
Brief description
Fig. 1 is the icpt design system block diagram with compensating of the present invention.
In figure:
1st, the structure of former secondary coil is fixed, and input voltage sets, and initializes the maximum number of turn and the maximum of former secondary coil
Electric current density 2, change coil geometry 3, initialize former secondary coil the number of turn 4, initialize former secondary coil transversal
The inductance 6 of the frequency factor 5 of area and secondary coil, the inductance of initialization primary coil and secondary coil, increase secondary coil
Frequency factor 7, the feature 8 according to the compensation topology structure of former secondary coil, the transfer power judging secondary coil and load
The magnitude relationship formula 10 of the magnitude relationship formula 9, the electric current density judging primary coil and maximum current density of power, increase former limit
The magnitude relationship formula 12 of the cross-sectional area 11, the electric current density judging secondary coil and maximum current density of coil, increase secondary
The magnitude relationship formula 14 of the cross-sectional area 13 of coil, the number of turn judging primary coil and the maximum number of turn, the primary coil number of turn add one,
The secondary coil number of turn is constant 15, the icpt system of the compensation topology structure of former secondary coil and equipment combines whether reach efficiency
The magnitude relationship formula 17 of the requirement 16 improving, the number of turn judging secondary coil and the maximum number of turn, the secondary coil number of turn add one, former limit
Coil turn is constant 18, optimize final coil
Specific embodiment
In conjunction with the contactless charge efficiency of electric automobile improving based on electromagnetic induction coupling principle to the present invention for the accompanying drawing
Method is illustrated.
The electric automobile contactless charge efficiency method based on electromagnetic induction coupling principle for the raising of the present invention is to be based on
Icpt system is applied to the preferable optimized design approach of charging batteries of electric automobile, defines a new design factor kd, it
The relating to parameters such as the regional location appropriate with the cross-sectional area of optimal number coil, coil, compensating electric capacity.By design ideal
The icpt system optimizing, utilizes its four the most frequently used compensation topology structures simultaneously, draws the compensation topology structure of optimum.Its
The resonant frequency of the middle icpt system compensation topology structure basic to four indicates the disappearance of related bifurcation and minimum copper
The utilizing status of block of material.
The electric automobile contactless charge efficiency method based on electromagnetic induction coupling principle for the raising of the present invention, the method
It is in primary coil external power supply, coupled under conditions of secondary coil produces energy by electromagnetic induction and carry out device systems are filled
Electricity, this device systems includes the primary coil of guide rail laying and the secondary coil that electric automobile is built-in, by electromagnetism sense
The sized turns of the topological structure described former secondary coil of change of coupled system and the relative position of former secondary coil is answered to come to electricity
Electrical automobile battery carries out contactless charging, and the method comprises the following steps:
A) data of electromagnetic induction coupling system model prepares, and the input voltage including primary coil is set as 220v, former
The maximum number of turn of sideline circle is set as 27 circles, and the maximum number of turn of secondary coil is set as 7 circles, the maximum current density of primary coil
It is set as 5a/mm2, the maximum current density of secondary coil is set as 4a/mm2, the initial number of turn of primary coil and secondary coil is equal
It is set as 1 circle, the cross-sectional area of primary coil is set as 2.5mm2, the cross-sectional area of secondary coil is set as 10mm2, secondary line
The frequency factor of circle is set as 1.
B), after data is ready to complete, the frequency factor 6 of adjustment secondary coil is so that transfer power p of secondary coil2≤ electricity
Bearing power p of electrical automobileload, then the cross-sectional area of adjustment primary coil and secondary coil is so that the electricity of former secondary coil
Current density is less than the maximum current density of former secondary coil.
C), after electric current density meets requirement, judge whether primary coil and the existing number of turn of secondary coil are less than primary coil
With the maximum number of turn of secondary coil, and add one to the existing number of turn of primary coil and secondary coil.
D) detect the compensation topology structure of former secondary coil and the icpt system of equipment combine whether reach efficiency raising
Requirement 15, optimize complete final coil 18.
In described step a), the structure of former secondary coil is fixed, and the number of turn 3 initializing former secondary coil is a circle, just
The cross-sectional area 4 of the former secondary coil of beginningization, the initialization inductance of primary coil and the inductance 5 of secondary coil.
In described step b), judge the transfer power of secondary coil and the magnitude relationship of bearing power 8, if transfer power
p2＞ bearing power pload, then the frequency factor 6 of secondary coil must be increased, until transfer power p2≤ bearing power pload, connect
And the electric current density of primary coil and the magnitude relationship of maximum current density 9 are judged by measurement, judge the electric current of secondary coil
Density and the magnitude relationship of maximum current density 11, check whether the electric current density of secondary coil is less than the maximum of former secondary coil
Electric current density；If condition is unsatisfactory for, corresponds to the cross-sectional area 10 increasing primary coil respectively and increase the transversal of secondary coil
Area 12, requires until electric current density meets.
In described step c), after electric current density meets requirement, judge the number of turn of primary coil and the size of the maximum number of turn 13
Relation, that is, check whether the number of turn of primary coil is less than the maximum number of turn of known primary coil, if it is less, judging secondary
The number of turn of coil and the magnitude relationship of the maximum number of turn 16, whether the number of turn reexamining secondary coil is less than the largest turn of secondary coil
Number, if it is not, then the primary coil number of turn adds one, the secondary coil number of turn 14 is constant, if it is less, the primary coil number of turn is not
Become, the secondary coil number of turn 17 Jia one.
In described step d), judge the number of turn of primary coil and the magnitude relationship of the maximum number of turn 13, that is, check primary coil
The number of turn whether less than the maximum number of turn of primary coil, if it is not, then check the compensation topology structure of former secondary coil with
The icpt system of this equipment combines the requirement 15 whether reaching efficiency raising, if be unsatisfactory for, need to change primary coil and
The geometry 2 of secondary coil, is verified again, if it is satisfied, then optimize completing.
As shown in figure 1, the optimization process of icpt system needs to know some as coil turn, supply voltage, coil
The preliminary parameters such as high current density and cross-sectional area, that is, the input voltage of primary coil be set as 220v, the maximum of primary coil
The number of turn is set as 27 circles, and the maximum number of turn of secondary coil is set as 7 circles, and the maximum current density of primary coil is set as 5a/
mm2, the maximum current density of secondary coil is set as 4a/mm2, the initial number of turn of primary coil and secondary coil is all set as 1
Circle, the cross-sectional area of primary coil is set as 2.5mm2, the cross-sectional area of secondary coil is set as 10mm2, the frequency of secondary coil
Factor is set as 1.
Flow process, after data is ready to complete, judges the transfer power of secondary coil and the big of bearing power 8 as shown in Figure 1
Little relation, if transfer power p2＞ bearing power pload, then the frequency factor 6 of secondary coil must suitably be increased, until transfer
Power p2≤ bearing power pload, next judge electric current density and maximum current density 5a/mm of primary coil2Size close
It is formula 9 and the electric current density and maximum current density 4a/mm that judge secondary coil2Magnitude relationship formula 11, check former secondary line
Whether the electric current density of circle is less than the maximum current density of former secondary coil；If condition is unsatisfactory for, corresponding increase former limit respectively
The cross-sectional area 10 of coil and the cross-sectional area 12 increasing secondary coil, increase 0.2mm2Corresponding to primary coil and secondary coil
Cross-sectional area be set 2.5mm2、10mm2, until electric current density meet the maximum current density of primary coil setting as
5a/mm2, secondary coil maximum current density be 4a/mm2Requirement.
After electric current density meets requirement, judge the number of turn of primary coil and the magnitude relationship formula 13 of the maximum number of turn 27 circle, that is,
Check whether the number of turn of primary coil is less than the maximum number of turn of known primary coil, if it is less, judging secondary coil
The number of turn and the magnitude relationship formula 16 of the maximum number of turn 7 circle, that is, whether the number of turn reexamining secondary coil is less than known secondary coil
The maximum number of turn, if it is not, then the primary coil number of turn adds one, the secondary coil number of turn 14 is constant, return redesign, if
It is less than, then the primary coil number of turn is constant, the secondary coil number of turn 17 Jia one, return and redesign.
Judge the number of turn of primary coil and the magnitude relationship formula 13 of the maximum number of turn 27 circle, that is, check that the number of turn of primary coil is
The no maximum number of turn less than known primary coil, if it is not, then detecting the compensation topology structure of former secondary coil and setting
Whether standby icpt system combines reaches the requirement 15 of efficiency raising, if be unsatisfactory for, needs to change the geometry knot of coil
Structure 2, then checking optimizes again, if it is satisfied, then optimize completing final coil 18.
Claims (5)
1. a kind of electric automobile contactless charge efficiency method improving based on electromagnetic induction coupling principle, the method is former
External power supply is enclosed in sideline, is coupled by electromagnetic induction and carries out to device systems charging under conditions of secondary coil produces energy,
This device systems includes the primary coil of guide rail laying and the secondary coil that electric automobile is built-in, is coupled by electromagnetic induction
The topological structure of system changes described primary coil, the sized turns of secondary coil and relative position and batteries of electric automobile is entered
The contactless charging of row, the method comprises the following steps:
A) data of electromagnetic induction coupling system model prepares, and the input voltage including primary coil is set as 220v, former limit line
The maximum number of turn of circle is set as 27 circles, and the maximum number of turn of secondary coil is set as 7 circles, and the maximum current density of primary coil sets
For 5a/mm2, the maximum current density of secondary coil is set as 4a/mm2, the initial number of turn of primary coil and secondary coil all sets
For 1 circle, the cross-sectional area of primary coil is set as 2.5mm2, the cross-sectional area of secondary coil is set as 10mm2, secondary coil
Frequency factor is set as 1；
B), after data is ready to complete, the frequency factor (6) of adjustment secondary coil is so that transfer power p of secondary coil2≤ electronic
Bearing power p of automobileload, then the cross-sectional area of adjustment primary coil and secondary coil is so that primary coil and secondary line
The electric current density of circle is respectively smaller than the maximum current density of primary coil and secondary coil；
C), after electric current density meets requirement, judge whether primary coil and the existing number of turn of secondary coil are less than primary coil and pair
The maximum number of turn of sideline circle, and add one to the existing number of turn of primary coil and secondary coil, that is, judge the number of turn of primary coil with
The magnitude relationship of the maximum number of turn of primary coil, checks whether the number of turn of primary coil is less than the largest turn of known primary coil
Number, if the number of turn of primary coil is less than the maximum number of turn of primary coil, judges the number of turn of secondary coil and secondary coil
The magnitude relationship of the maximum number of turn, whether the number of turn reexamining secondary coil is less than the maximum number of turn of secondary coil, if secondary line
The number of turn of circle is not less than the maximum number of turn of secondary coil, then the primary coil number of turn adds one, and the secondary coil number of turn is constant, if secondary
The number of turn of coil is less than the maximum number of turn of secondary coil, then the primary coil number of turn is constant, and the secondary coil number of turn adds one；
D) detect the compensation topology structure of former secondary coil and described device systems combine whether reach the requirement of efficiency raising
(15), that is, check whether the number of turn of primary coil is less than the maximum number of turn of primary coil, if the number of turn of primary coil is not less than
The maximum number of turn of primary coil, then check the compensation topology structure of former secondary coil and described device systems combine whether reach effect
The requirement (15) that rate improves, if being unsatisfactory for the requirement (15) of efficiency raising, needs to change primary coil and secondary coil
Geometry (2), is verified again, if meeting the requirement (15) of efficiency raising, optimizing and completing.
2. the contactless charge efficiency side of electric automobile improved based on electromagnetic induction coupling principle according to claim 1
Method, is characterized in that: in described step a), the structure of former secondary coil is fixed, and the number of turn (3) initializing former secondary coil is one
Circle, the initialization cross-sectional area of former secondary coil and the frequency factor (4) of secondary coil, the inductance of initialization primary coil and pair
The inductance (5) of sideline circle.
3. the contactless charge efficiency side of electric automobile improved based on electromagnetic induction coupling principle according to claim 1
Method, is characterized in that: in described step b), judges the transfer power of secondary coil and the magnitude relationship of bearing power (8), if secondary
Transfer power p of sideline circle2＞ bearing power pload, then the frequency factor (6) of secondary coil must be increased, until transfer power
p2≤ bearing power pload, then pass through measurement and judge the electric current density of primary coil and the maximum current density (9) of primary coil
Magnitude relationship, if the electric current density of primary coil be not less than primary coil maximum current density, increase primary coil
Cross-sectional area (10)；If the electric current density of primary coil is less than the maximum current density of primary coil, judge secondary line
The magnitude relationship of the maximum current density (11) of the electric current density of circle and secondary coil, if the electric current density of secondary coil is not little
In the maximum current density of secondary coil, then increase the cross-sectional area (12) of secondary coil；If the electric current density of secondary coil
Less than the maximum current density of secondary coil, then meet and require.
4. the contactless charge efficiency side of electric automobile improved based on electromagnetic induction coupling principle according to claim 1
Method, is characterized in that: in described step c), after electric current density meets and requires, judges the number of turn of primary coil and primary coil
The magnitude relationship of the big number of turn (13), that is, check whether the number of turn of primary coil is less than the maximum number of turn of known primary coil, such as
The number of turn of fruit primary coil is less than the maximum number of turn of primary coil, then judge the number of turn of secondary coil and the largest turn of secondary coil
The magnitude relationship of number (16), that is, whether the number of turn reexamining secondary coil is less than the maximum number of turn of secondary coil, if secondary line
The number of turn of circle is not less than the maximum number of turn of secondary coil, then the primary coil number of turn adds one, and the secondary coil number of turn (14) is constant, if
The number of turn of secondary coil is less than the maximum number of turn of secondary coil, then the primary coil number of turn is constant, and the secondary coil number of turn (17) Jia one.
5. the contactless charge efficiency side of electric automobile improved based on electromagnetic induction coupling principle according to claim 1
Method, is characterized in that: in described step d), judges the number of turn of primary coil and the magnitude relationship of the maximum number of turn (13), that is, checks former
Whether the number of turn of sideline circle is less than the maximum number of turn of primary coil, if the number of turn of primary coil is not less than the maximum of primary coil
The number of turn, then detect the compensation topology structure of former secondary coil and the icpt system of equipment combine whether reach wanting of efficiency raising
Asking (15), if being unsatisfactory for the requirement (15) of efficiency raising, needing to change the geometry of primary coil and secondary coil
(2), again verified, if meeting the requirement (15) of efficiency raising, optimizing and completing.
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| CN201510157373.4A CN104779686B (en) | 2015-04-03 | 2015-04-03 | Method for improving efficiency of ICPT (inductively coupled power transfer)-based non-contact charging for electric vehicle |
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| CN201510157373.4A CN104779686B (en) | 2015-04-03 | 2015-04-03 | Method for improving efficiency of ICPT (inductively coupled power transfer)-based non-contact charging for electric vehicle |
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| CN105857106A (en) * | 2016-05-16 | 2016-08-17 | 天津大学 | Identification method for dynamic wireless charging targets of electric automobiles on basis of magnetoresistive sensor array |
| CN107276241B (en) * | 2017-05-10 | 2023-05-09 | 北京交通大学长三角研究院 | Wireless power transmission adjusting method based on tramcar parking offset error |
| CN107749676A (en) * | 2017-11-20 | 2018-03-02 | 南通理工学院 | Six-ring type electric energy wireless transmission facility |
| CN108281258B (en) * | 2018-01-16 | 2019-05-17 | 哈尔滨工业大学 | Asymmetric magnetic coupling arrangement based on centered magnetic field |
| CN111439142B (en) * | 2020-05-26 | 2022-03-04 | 中国人民解放军火箭军工程大学 | Electromagnetic resonance coupling type wireless charging efficiency optimization method suitable for unmanned aerial vehicle |
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| JP2013223409A (en) * | 2012-04-19 | 2013-10-28 | Sony Corp | Transmission device, non-contact power transmission system, and signal generating method |
| CN103312047A (en) * | 2013-05-09 | 2013-09-18 | 北京航空航天大学 | High-efficiency large-power electric energy transmitting and receiving device of contactless charging system |
| FR3010252B1 (en) * | 2013-08-30 | 2015-08-21 | Continental Automotive France | BI-MODE MAGNETIC COUPLING CHARGE DEVICE AND METHOD FOR MOTOR VEHICLE |
| CN104092316B (en) * | 2014-07-25 | 2016-05-25 | 东南大学 | Constant current output type induction type wireless power transmission converter and parameter selection method thereof |
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